/*
 * Copyright 2021 spring-boot-extension the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

package com.livk.proto.rocketmq.converter;

import com.livk.proto.User;
import com.livk.proto.UserConverter;
import org.springframework.lang.NonNull;
import org.springframework.messaging.Message;
import org.springframework.messaging.MessageHeaders;
import org.springframework.messaging.converter.MessageConverter;
import org.springframework.messaging.support.GenericMessage;

/**
 * @author livk
 */
public class UserProtobufMessageConverter implements MessageConverter {

	private final UserConverter userConverter = UserConverter.INSTANCE;

	@Override
	public Object fromMessage(Message<?> message, @NonNull Class<?> targetClass) {
		if (message.getPayload() instanceof byte[] bytes && User.class.equals(targetClass)) {
			return userConverter.convert(bytes);
		}
		return null;
	}

	@Override
	public Message<?> toMessage(@NonNull Object payload, MessageHeaders headers) {
		if (payload instanceof User user) {
			byte[] bytes = userConverter.convert(user);
			return new GenericMessage<>(bytes, headers);
		}
		return null;
	}

}
